Motor-controller.



0.872- I PAT-ENTED APR. 16, 1907. A. PEDERSEN.

MOTOR GONTROLLER.

APPLIUATIOH FILED 0.16, 1906.

UNITED STATES PATENT OFFICE.

ADOLPH PEDER'SEN, OF CLEVELAND, onto; ASSIGNOR TO THE VAN nonu- ELLIOTTELECTRIC COMPANY. OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

moron-coarseness- Specification of Letters Patent.

Patented April s, 1907.

Orlglnel lpplicafiori'flled 8eptember1i!,1904, Serial a. 221,053.mammal-imam August is. 1905. Serial In. 214.398.

. To all whom it may concern Be it known that I, ADoLPn Pnnnnsnu, a

I citizen of the United States, and a resident of Pin the claims.

Cleveland, county of Cuyahoga, and State of Ohio, have invented a newand useful 1111-.

provement in Motor-Controllers, of which the following is aspecification, ,the principle of the inventionbein herein explained andthc'best mode in whic I have contemplated applying that principle, so asto distinguish it om other inventions.

My invention relates to :mechanism for controlling the operation ofelectric motors.

Reference need scarcely bej'made to the fact that one of the chiefdifficulties in using an electric motor where a variable load is en- Theannexed drawings the following description set forth indetail certainmechanism embodying the invention, such dis closed means constitut'- butone of various mechanical forms in winch the principle of the inventionmay be used. V In said annexed drawings, Figure Impresents a planiyiewof my improved motorcontroller in its casing. LFig. 2 represents ahorizontal cross-section of the same as cut by a plane passing throughline 2 2, Fig.4. Fig. 3 represents a vertical cross-section thereof ascut by a plane passing through line, 3 3,

' 4'; and F g. 4 represents a vertical cross- 1.'pr9vementin.elect1icallycpem' 5 f 19,04; However,-

section thereof as cut by a plane passing through'iine 4 4, 1.8111112.

' sub'cct-matternf application has. been out-ofm'y rior application for:United- '-;Letters item; for an im-, ted portable eswiia filed September19-, m1 m o ro l Ihwsh ne pmwularlr designates the casing 'tion of thecontroller to is attached to casi suited for use on electricallym' tedportable drills because of its aim Katy and lightness is equally welladapted or use in numerone other situations where it is desired toprovide a small, compact, and cfiicient controlling mec i In the form ofmy improved motor-controller shown in the accompan wings, A

within which the controller is contained, and B a handle rotatablyattached thereto. In thelparticular applicae situation above referredtocasing A would either fonn a part of or be attached to themotor-casing M, Figs. 3- and 4, and handle B would referahly be one ofthe handles whereby t drill IS manipulated. The inca'sed controller, asshown in the figures just referred to, is secured to the motor-cas'substantially directly over one of the po e-pieces P of the motor-field.Themanlxar in which handle B a P8813 Ill The inner end of the p ameterto fitin the bore of a boss A, pro ectfrom the casing A, and theportiono the handle extending within the is still further reduced, sothat an'oflset b is armed,

ggxlich 0131 8101118 aformed witgn the bone see an is against' sinledge" b means ofkeys b, fitted in boss A",'so as ti) register inngroove bfencircling handle B.

Secured to handle B, so as to fitover and cover boss A, is a sleeve B,provided with a bottom flange b, which has formed in its peripheriyanotch b, Fig. 1., out upon the are of a circ e. Adjacent to this sleeveB is the knob G of switch C", 2, d to revelsethe current through themotor which it is desired to control. Knob C is rovided F 4. ndle 1s ofreducdg di' with a circular bottom flange c, which has a etc is thusformed, y means of which it is evi ant that the operation of the raveswitch C is prevented except when handle occupies a certain position,such than being etennined by the location 0 notch b on flange b'.' Theobject of thhu'rangement' will appear in whatfollows.

.MrmntedonflmendofthehandleBwhich disks from each other. Disk to contactwith one, two, up to all of a series As has been state of contacts k,mounted upon an insulatin block K and permanently connected wit eachother through suitable resistances (not shown) interposed one betweeneach pair of contacts except the first, to whic L of the motor-circuitis connecte "As will be readily understood, the. vcircuit connectionsare such that by rotating disk E with contact member E the circuit isfirst closed, when the first two of contacts is are joined, and theresistances are then successively out out, so that when such member linewir is m contact withall of contacts k the full current is allowed toass through the motor. (i disk E is rotatable upon handle B,and it,normally held in its off position+'i. e'.', sqtharlrthe circuit isbrokenbymeans of a coil-spring E which encircles washer wand is attachedat one end to casing Aandat: the other to such disk E. Rotationof disk Efrom such normal position, so as to connect the circuit and successivelycut out the interposed resistances, iseflected by rotation of disk D,which is connected with disk E by means of a form of'catd'i.v This catchcomprises a flat spring (I, Fi L2 and 4, attachedto the under side ofdis D, and bears on its free enda pin (1', which projects up through anapertured far. enough to engage an aperture e in disk -E when the twodisks occupy the proper relative positions. Thus by turning the handle Band disk D attached thereto until pin (1- is brought into register withaperture e indisk E such last-named disk becomes also ,rotativelyattached to handle B and can be rotated to turn on the current asdesired.

Passscrewed into the pole-piece P, adjacent to the controller, soas tohave itsupper end. lpath oftravel of l 1n roximity to the sp rin daisdisk D is rotate is an iron member Such construction, it will beobserved, will render this member P m etic when pole-piece 'P- ismagnetized of current throu h the motor-fiel y locating member I sothatin d'. will be di- ,rectl above-it when the dis E has been rotatethereby to its -onfpositionitis evis dent that -u n-the attractionjofmagnetic member? ecomin'g sufficiently strong pin in such disk:

through the motor-casing M and b the llow ger the motor, the member- Pxufiion' such "conditions being for use in d will be drawn released and,under the influence of spring E, be returned to its ofl position. This'will occur whenever the magnetic flux ofthe motor reaches a certainpredetermined amount gaged by the flexibility of spring d.

The mechanism. of m 1m roved motorcontroller having been t us describedin detail, it only remains to indicate its mode of operation. Normallythe disk E is in the off position. To turn the current on, handle B. andthereby disk D, must be rotated until pin (1 engages aperture e,whereupon disk E also becomes connected with handle B, so as to rotatetherewith, and can accordingly be turned to connect the circuit'and tosuccessively cut out the resistances placed between contacts 7c untilthe full current is flowing through the motor. By turning-the handle inthe opposite direction one or more of such resistances can be replacedin the circuit. To reverse the current, the handle has to be turned backuntil the circuit is broken before the notch bin flange b will bepositionedto permit therotation of knob C of reversingswitch 0. Such're'versin switch is securely locked-from turning-atal other positionsof the handle B.- v

' .If, while the current is on for any reason such current becomes sostrong as to endansimultaneously becomes sufiic'iently magnetized toattract toward and disk E be thus pin d to itself, and thusautomatically turn the current; off in the manner already .set

forth; It is thus seen that with my controller in use a workman cannotreverse the cur rent through the motor without first turning the currentoff. Neither can he continue using the motor underv conditions thatrender 'itliable to be burnt out, for immediately approxnate'd ecurrentis automatically turned 0 At the same time the current is capableof manualcontrol as well so long as suchibounds of safety are notoverstepped." The simplicity of the device and thefp'rotectionof itsparts from any interference adapt .my controller erative.

I I wish particularly to point out that Ihave provided 9. ve convenientarrangement whereb. one ,of the handlesyutilizedfor moving an the drillor other machine is also utilized for operating the controller, al-

' though obviously separate handles might be used for these two osesthat the operative can in no. way

the mainarmature circuit, have been utilized of the motor-field.

plish ux or force the machine. *tothe work over and above its adjustedca-- pacity, and'that whereas heretofore separate andindependent means;such as a solenoid in 1 the hands of an nexperienced opler comprising amovable contact member,

and manually-o erable means adapted -'to move said mem er and controlledby the magnetic, flux of such motor. I

3 The combination with an -electric circuit and a motor therein; of acut-out switch comprising a movable contact member;

means adapted to retain the same normally in a predetermined position;and means adapted to move said member to and retain the same in anyother desired position, said latter means being controlled bythemagnetic flux of such motor and adapted to have its operative and.inoperative conditions changed from one to t e other only when such fluxreaches a predetermined maximum.

4. The combination of an electric circuit and a motor therein a cut-outswitch comprising a movable contact member; means ada ted to retain thelatter normally in its oi position; and means'adapted to move k trolledquantity;

said member to and retain thesame in any other position, said lattermeans controller by the magnetic flux of such motor, and adapted tobechanged from an operative to an inoperative condition only when suchflux reaches a redetermined maximum. 5. The com ination-with an electriccircuit and a motor therein; of a motor-controller comprising a movablecontact member, means adapted to retain thejsame normally in apredetermined position, and manuallyoperable means adapted to move saidmember to and retain the same in any other de' sired osition', saidlatter means being con by the magnetic flux of such motor.

6. The combination with an electric circuit and a motor therein; of amotor-controller comprising a movable contact member, means adapted toretain the same normally in a predetermined position, and manually-'operable means adapted to move said member to other positions, saidlatter means be-- ingrendered inoperative when the magnetic fluxof suchmotor reaches a predetermined 7. The cuit and a motor therein; of amotor-controller corpprising a'movable contact member adapts to normallyoccupy its "0 position, a manually-operable member adapted to move saidcontact member to it's on position, and retain said member in said 0-sition, said manually-operable member being combination with an electriccirrendered ino rative to retain said contact member in said on positionwhen the magnetic flux of such motor reaches a predetermined quantity.

8: The combination with an electric circuit and a motor therein; of amotor-controller comprising a manually-operable member, a movablecontact member, and means adapted to operatively. connect said twomembers and controlled by the magnetic flux of such motor.

9. The combination with an electric circuit and a motor therein; of amotor-controller comprising a manually-operable member, a movablecontact member, means for bolding the latter normally in its olf"position, and means adapted to operatively connect said two members andactuated to disengage when the magnetic flux of such motor reaches apredetermined quantity.

' 10. The combination with an electric circuit and a motor therein, of amotor-controller com rising a movable handle, a member fixed t ereto, amovable contact member adapted to normally occupy its oil' )Sltion, andmeans ada ted to connect sait two members and contro ed by the magnetic[but of such motor.

11. The combination with an electric cir-- cuit, and a motor therein; ofa motor-controller comprising a manually-operable member, a movablecontact member adapted to normally occupy its off position, and meansadapted to connect said two members whereby said contact member may bemoved to other positions, said means being controlled by the magneticflux of such motor.

5 r 12. The combination with an electric cirand a motor therein; ofa'motor-controller comprising a movable handle, a member fixed to saidhandle, a contact member movable on said handle, means tending to retainsaid contact member inits o position, and means automatically operatedto connect said contact member with said first named member, wherebysaid contact member may be moved to its on position, said latter meansbeing electrically'controlled.

13. The combination ofan electric circuit and a motor therein; amotor-controller comprising a movable contact member; means ada oposition; and other means automatira ally operated to e c with saidmember, said latter means being manually operable to move said member toany other desired position and retain the same therein, said formermeans being rendered operative and said latter means inoperative onlyunder the condition of an ove oad in the circuit.

14. The combination with an electric circuit and a motor therein; of amotor-control ler com rising a mannallEe-operable member, a mova locontact mcm r, and means car+ ried by and movable withsaid'manually-opted to retain the same normally in its manu member, both'of said a IIIOVIL 4o ler com a mova le-contact member, means adapted,retain said-contact member ma.'

erable-member, and adapted to be automat-' ically operated to connectthe latterwith said contact member, said means op erativel controlledindependently of said operable member. 15. T e combination with anelectric'circuit and a motor therein; of a motor-controller com amanuall -operable member a mova le contact mem 1', means adapte 10 tononnally retain the latter in a redetermined posit on, and meanscarriebyand movable with said manually-operable member, and adapted to beautomatically operated to. connect the latterwith said contact meansopera tively controlled independently of said manually-operable member.-

16. The combination with an electric cir cult and a motor therein; ofamotor-controL. 2o ler com rising a manualllyesoperable member,

a move le contact mem r, and means carried by and movable with saidmanually-ops 'erable member, and adapted to be automatically operated toconnect the latter with said 25 contact member, said means beingelectric-- ally controlled.-

' 17. The combination with an eIectric c'iI- lercomgrising amanually-operable member, le contact member, -means to normally retainthe latter in a mined position, and means carrie movable with saidmanually-operable mem cuit and a motor therein; of a motorcontrolredeterher, and adapted to be automatically oper- 3 5 ated to connectthe latter with said contact member, said latter means electricallycontrolled. f 18. The combination with an electric circuit and a motortherein of a motor-controla manually-operable member,

to normally predetermined position, and means carried y and movable withsaidmanually-operable' member, and adapted-to be automatically operatedto connect the latter with said con tact member whereby the latter maybe moved to other positions, said operative connection' broken to allowsaid first-men- 5o tioned means-to become operative when a predeterminedelectrical condition is attained.

19. The combination with an electric circuit and a motor therein; of amotor-controller comprising a manually-operable. member,

a movable contact member, and movable means adapted to be automaticallyoperated, under the condition of no load in the circuit,

to connect said two members, and adapted to retain said connectionexceptunder the condition of an overload in the circuit, whereby saidcontact member maybe moved in either direction, and retained in anydesired position, said means in'g adapted to be elecadapted by andwhereby said contact member may be moved 7 5 to-and retained in its onposition, said means being adapted to be electrically operated to breaksuch connection between saidtwo members.

21. The-combination with an electric cir- 8o cult and a'motor therein ofa motor-controller com rising a manuall -operable member, a movablecontact mem er adapted to normally occupy. itsoff position, andmechanicall- -operated means adaptedto be au- 8 5 tomatica 1y 0 erated,when said contact member is in its off position, to connect saidtwomembers, whereby saitl contact member may be moved toand retained in itson position,

under the condition of an=overload in the cir-' cuit, to be electricallyoperated to break suchconnection between said two-members. I '22.-The-combination with an electric circuit and a motor therein, of amotor-control- 5 ler comprising a movable handle, a member fixed to saidhandle, a contact member movable on said handle, means adaptedtobe-mechanically o erated to connect said two members an break suchconnection.

' 23. The combination with an electric cit-- cuit and amotor therein, ofa motor-control-l fler comprising a movable handle, a member fixed tosaid handle, a contact member mov- 105 ablev onsaid handle, meanstending to holdsaid contact member in-its ofi osition andmeans adaptedto be mechanica 1y 0 erated to connect said two members where y saidcontact member may be moved to its -on no position, and to: beelectrically operated to reak such connection.

24. The combination with an electric circuit and a motor therein, of amotor-controller comprising a manually-operable member, 1 15 a movelecontac t member adapted to open and; close said-circuit and to outputaresistance therein, means ad apted to normally retain said contactmember in a predetermined position, and means, controlled 1:17 the magsr 20 netic flux of said motor, mounte upon said first member and adaptedto operativel nect said contact member with sai member.

confirst 25; The combination with an electriccir- I2 5 cuit and 'a'motor therein, of a.motor-contr0l-' ler comgrising. amanuallv-operablemember,- a mova le contact member-adaptedto openperated' to break the connection beor adapted to norsaid -means beingadapted,

to be electrically operated to rooand close said circuit and to cut outa resistance therein, means adapted to normally retain said contactmember in a predetermined position, and means, mounted on said first '5member, adapted normally to engage said contact member, whereby saidcontact member is operatively connected with said lirst member, and tobe actuated to disengage said contact member when the magnetic flux of 1said motor reaches a predetermined quantity.

26. The combination with an electric circuit and a motor therein, of amotor-controller comprising a movable handle, a member fixed to suchhandle,-a contact member-mow r 5 able on said handle, a spring adaptedto normally retain said contact member in its oli position, and a catchon said first-named member adapted normally to engage said contactmember and to be disengaged therefrom when the magnetic flux of suchmotor reaches a predetermined quantity.

27. The combination with an electric circ'uit and a motor therein, of amotor-controller comprising a movable handle, a member fixed to suchhandle, a contact member movable on said handle, a spring adapted tonormally retain said contact member in its off position, a catch on saidfirst-named member adapted normally to engage said contact member, and amagnetizab e member connected with a pole-piece of such motor andadapted when the magnetic flux in such polepiece reaches a predeterminedquantity to disengage said catch from said contact. mem- 3 5 ber.

28. The combination with an electric cir cuit and a motor therein; of amotorcontrol-- ler comprising a manually-operable member, a movablecontact member adapted to open and close said circuit and to cut outresistance therein, means adapted to normally retain said contact memberin a predetermined position, and means automatically 0 erated to connectsaid two members, sai latter means being electrically controlled tobe-rendered ino erative only under the condition of an over oad in thecircuit.

29. The combination with an electric circuit and a motor therein; of amotor-controller com rising a manually-operable member, a move )lecontact member adapted to open and close said circuit and to cut outresistance therein, means adapted to normally retain said contact memberin a redetermined position, and means mounte on said first member andadapted to be automatically operated to connect the latter with saidcontact member, said latter means being electrically controlled to berendered inoperative only under the dondition of an overload in thecircuit.

30. The combination with an electric circuit and a motor therein; of amotor-controller comprising a movable handle, a member fixed to saidhandle, a contact member movable on said handle, means tending to retainsaid contact member in its off position, means automatically operated toconnect said contact member with said. first-named member, said lattermeans being electrically 7o controlled to be rendered inoperative onlyunder the condition of an overload in the circuit, and areversing-switch interlocked with said handle so as to be operable onlywhen thelatter is in its off position.

31. The combination with an electric circuit and a motor therein; of acontroller member therefor, a retractile spring adapted to throw saidmember into its off position, a handle, and means for connecting thelatter and said member, said connecting means renderin said springinoperative, a predetermined quantity of flux in such motor renderingsaid connecting means inoperative and said spring operative. I 5

32. The combination with an electric circuit and a motor therein; of acontroller member therefor, a movable handle, a member fixed to thelatter, a spring-actuated lockin -piece secured to said fixed member andadapted to engage said controller member, and a retractile springconnected to the latter and adapted to actuate the same to assume its ofposition when said lockingpiece is disengaged therefrom, the actuationof said locking-piece being controlled by the magnetic flux of themotor.

33. The combination with an electric circuit and a motor therein; of amovable controller member therefor, a handle,'a springactuated catchcarried by the latter and ada ted to engage andv disengage said controler member, a retractile spring arranged to throw the latter into its offposition when said catch is disengaged, and a magne- 5 tizable memberconnected with a ole-piece of the motor-field,.said catch being ocatedin the ma etic field of said magnetizable member an iorming an armaturefor the latter.

34. In devices of the general character described, the combination of amotor provided with a suitable casing; a ,controller comprising a.movable contact member, manuallyoperable means adapted to move thelatter off and on as desired, said latter means 5 being inoperative onlyunder the condition of an overload in the circuit, and means adapted tothrow said contact member auto.- maticall to its off position under suchoverloa and a casing for said controller I20 mounted upon saidmotor-casing.

35. In devices of the general character described, the combination of amotor provided with a suitable casing; a controller-casing mounted uponsaid motor-casing; a movable I 5 handle for holding and guiding thetool; a

contact member within the latter normally operatively connected to saidhandle; and connecting means within said controller-casing for saidhandle and contact member I3 adapted to be actuated to releaseindependently of the handle operation; and automatic means for throwingsaid contact member, when so released, to its off position, said contactmember, when so released, being incapable of any manual operation or ofany.

interferencewith its movement to its off position.

36. In devices of the general character de-.

scribed, the combination of a motor provided with a suitable casing; acontroller-casing mounted upon said motor-casing; a movable handle forholding and guiding the tool exsaid contact member, when so released, toits off position, said contact member, when so released, being incapableof any manual operation or of any interference with its movement to itsoil' position.

37. In devices of the general character described, the combination ofamotor provided with a suitable casing; a controller-frame mounted uponsaid motor-casing substantially directly over a pole-piece of themotorfield; and a movable contact member mounted upon saidcontroller-frame and controlled by the magnetic flux of the motor-field.

38. In devices of the general character described, the combination of amotor provided with a suitable casing; a controller-casing mounted uponsaid motor-casing substantially directly over a pole-piece of themotorfield; a movable handle for holding and guiding the toolextendingexteriorly from within said controller-casing; a contact memberwithin the latter; means tending to hold said contact member in its off"position; and means normally operatively connecting said handle and saidcontact member, a predetermined quantity of magnetic flux in themotor-field actuating said latter means to disengage said contactmember.

39. The combination with an electric circuit and a motor therein; ofmeans for automatically breaking said circuit when the magnetic flux ofthe motor reaches a predetermined quantity.

40. The combination of an electric circuit and a motor therein; meansfor automatically breaking said circuit when the magnetic flux of themotor reaches a predetermined quantity," and manually-operable means forclosing the break in said circuit made by said antomatically-operatingmeans.

Signed. by me this 3d day of August, 1905.

ADOLPH PEDERSEN.

Attest: v

JNO. F. ()BERLIN, G. W. SAYWELL.

